title: Handedness control in a 2-μm optical vortex parametric oscillator.
abstract: We present the first handedness control of an optical vortex output from a vortex-pumped optical parametric oscillator. The handedness of the optical vortex was identical to that of the pump vortex beam. Over 2 mJ, 2-μm optical vortex with a topological charge of ± 1 was achieved. We found that the handedness of a fractional vortex with a half integer topological charge can also be selectively controlled.
authors.forename: Taximaiti
authors.initials: T
authors.lastname: Yusufu
authors.forename: Yu
authors.initials: Y
authors.lastname: Tokizane
authors.forename: Katsuhiko
authors.initials: K
authors.lastname: Miyamoto
authors.forename: Takashige
authors.initials: T
authors.lastname: Omatsu